1 /* SPDX-License-Identifier: GPL-2.0-or-later */
2 /*
3 * INET An implementation of the TCP/IP protocol suite for the LINUX
4 * operating system. INET is implemented using the BSD Socket
5 * interface as the means of communication with the user level.
6 *
7 * Definitions for the Forwarding Information Base.
8 *
9 * Authors: A.N.Kuznetsov, <kuznet@ms2.inr.ac.ru>
10 */
11
12 #ifndef _NET_IP_FIB_H
13 #define _NET_IP_FIB_H
14
15 #include <net/flow.h>
16 #include <linux/seq_file.h>
17 #include <linux/rcupdate.h>
18 #include <net/fib_notifier.h>
19 #include <net/fib_rules.h>
20 #include <net/inet_dscp.h>
21 #include <net/inetpeer.h>
22 #include <linux/percpu.h>
23 #include <linux/notifier.h>
24 #include <linux/refcount.h>
25
26 struct fib_config {
27 u8 fc_dst_len;
28 dscp_t fc_dscp;
29 u8 fc_protocol;
30 u8 fc_scope;
31 u8 fc_type;
32 u8 fc_gw_family;
33 /* 2 bytes unused */
34 u32 fc_table;
35 __be32 fc_dst;
36 union {
37 __be32 fc_gw4;
38 struct in6_addr fc_gw6;
39 };
40 int fc_oif;
41 u32 fc_flags;
42 u32 fc_priority;
43 __be32 fc_prefsrc;
44 u32 fc_nh_id;
45 struct nlattr *fc_mx;
46 struct rtnexthop *fc_mp;
47 int fc_mx_len;
48 int fc_mp_len;
49 u32 fc_flow;
50 u32 fc_nlflags;
51 struct nl_info fc_nlinfo;
52 struct nlattr *fc_encap;
53 u16 fc_encap_type;
54 };
55
56 struct fib_info;
57 struct rtable;
58
59 struct fib_nh_exception {
60 struct fib_nh_exception __rcu *fnhe_next;
61 int fnhe_genid;
62 __be32 fnhe_daddr;
63 u32 fnhe_pmtu;
64 bool fnhe_mtu_locked;
65 __be32 fnhe_gw;
66 unsigned long fnhe_expires;
67 struct rtable __rcu *fnhe_rth_input;
68 struct rtable __rcu *fnhe_rth_output;
69 unsigned long fnhe_stamp;
70 struct rcu_head rcu;
71 };
72
73 struct fnhe_hash_bucket {
74 struct fib_nh_exception __rcu *chain;
75 };
76
77 #define FNHE_HASH_SHIFT 11
78 #define FNHE_HASH_SIZE (1 << FNHE_HASH_SHIFT)
79 #define FNHE_RECLAIM_DEPTH 5
80
81 struct fib_nh_common {
82 struct net_device *nhc_dev;
83 netdevice_tracker nhc_dev_tracker;
84 int nhc_oif;
85 unsigned char nhc_scope;
86 u8 nhc_family;
87 u8 nhc_gw_family;
88 unsigned char nhc_flags;
89 struct lwtunnel_state *nhc_lwtstate;
90
91 union {
92 __be32 ipv4;
93 struct in6_addr ipv6;
94 } nhc_gw;
95
96 int nhc_weight;
97 atomic_t nhc_upper_bound;
98
99 /* v4 specific, but allows fib6_nh with v4 routes */
100 struct rtable __rcu * __percpu *nhc_pcpu_rth_output;
101 struct rtable __rcu *nhc_rth_input;
102 struct fnhe_hash_bucket __rcu *nhc_exceptions;
103 };
104
105 struct fib_nh {
106 struct fib_nh_common nh_common;
107 struct hlist_node nh_hash;
108 struct fib_info *nh_parent;
109 #ifdef CONFIG_IP_ROUTE_CLASSID
110 __u32 nh_tclassid;
111 #endif
112 __be32 nh_saddr;
113 int nh_saddr_genid;
114 #define fib_nh_family nh_common.nhc_family
115 #define fib_nh_dev nh_common.nhc_dev
116 #define fib_nh_dev_tracker nh_common.nhc_dev_tracker
117 #define fib_nh_oif nh_common.nhc_oif
118 #define fib_nh_flags nh_common.nhc_flags
119 #define fib_nh_lws nh_common.nhc_lwtstate
120 #define fib_nh_scope nh_common.nhc_scope
121 #define fib_nh_gw_family nh_common.nhc_gw_family
122 #define fib_nh_gw4 nh_common.nhc_gw.ipv4
123 #define fib_nh_gw6 nh_common.nhc_gw.ipv6
124 #define fib_nh_weight nh_common.nhc_weight
125 #define fib_nh_upper_bound nh_common.nhc_upper_bound
126 };
127
128 /*
129 * This structure contains data shared by many of routes.
130 */
131
132 struct nexthop;
133
134 struct fib_info {
135 struct hlist_node fib_hash;
136 struct hlist_node fib_lhash;
137 struct list_head nh_list;
138 struct net *fib_net;
139 refcount_t fib_treeref;
140 refcount_t fib_clntref;
141 unsigned int fib_flags;
142 unsigned char fib_dead;
143 unsigned char fib_protocol;
144 unsigned char fib_scope;
145 unsigned char fib_type;
146 __be32 fib_prefsrc;
147 u32 fib_tb_id;
148 u32 fib_priority;
149 struct dst_metrics *fib_metrics;
150 #define fib_mtu fib_metrics->metrics[RTAX_MTU-1]
151 #define fib_window fib_metrics->metrics[RTAX_WINDOW-1]
152 #define fib_rtt fib_metrics->metrics[RTAX_RTT-1]
153 #define fib_advmss fib_metrics->metrics[RTAX_ADVMSS-1]
154 int fib_nhs;
155 bool fib_nh_is_v6;
156 bool nh_updated;
157 struct nexthop *nh;
158 struct rcu_head rcu;
159 struct fib_nh fib_nh[];
160 };
161
162
163 #ifdef CONFIG_IP_MULTIPLE_TABLES
164 struct fib_rule;
165 #endif
166
167 struct fib_table;
168 struct fib_result {
169 __be32 prefix;
170 unsigned char prefixlen;
171 unsigned char nh_sel;
172 unsigned char type;
173 unsigned char scope;
174 u32 tclassid;
175 struct fib_nh_common *nhc;
176 struct fib_info *fi;
177 struct fib_table *table;
178 struct hlist_head *fa_head;
179 };
180
181 struct fib_result_nl {
182 __be32 fl_addr; /* To be looked up*/
183 u32 fl_mark;
184 unsigned char fl_tos;
185 unsigned char fl_scope;
186 unsigned char tb_id_in;
187
188 unsigned char tb_id; /* Results */
189 unsigned char prefixlen;
190 unsigned char nh_sel;
191 unsigned char type;
192 unsigned char scope;
193 int err;
194 };
195
196 #ifdef CONFIG_IP_MULTIPLE_TABLES
197 #define FIB_TABLE_HASHSZ 256
198 #else
199 #define FIB_TABLE_HASHSZ 2
200 #endif
201
202 __be32 fib_info_update_nhc_saddr(struct net *net, struct fib_nh_common *nhc,
203 unsigned char scope);
204 __be32 fib_result_prefsrc(struct net *net, struct fib_result *res);
205
206 #define FIB_RES_NHC(res) ((res).nhc)
207 #define FIB_RES_DEV(res) (FIB_RES_NHC(res)->nhc_dev)
208 #define FIB_RES_OIF(res) (FIB_RES_NHC(res)->nhc_oif)
209
210 struct fib_rt_info {
211 struct fib_info *fi;
212 u32 tb_id;
213 __be32 dst;
214 int dst_len;
215 dscp_t dscp;
216 u8 type;
217 u8 offload:1,
218 trap:1,
219 offload_failed:1,
220 unused:5;
221 };
222
223 struct fib_entry_notifier_info {
224 struct fib_notifier_info info; /* must be first */
225 u32 dst;
226 int dst_len;
227 struct fib_info *fi;
228 dscp_t dscp;
229 u8 type;
230 u32 tb_id;
231 };
232
233 struct fib_nh_notifier_info {
234 struct fib_notifier_info info; /* must be first */
235 struct fib_nh *fib_nh;
236 };
237
238 int call_fib4_notifier(struct notifier_block *nb,
239 enum fib_event_type event_type,
240 struct fib_notifier_info *info);
241 int call_fib4_notifiers(struct net *net, enum fib_event_type event_type,
242 struct fib_notifier_info *info);
243
244 int __net_init fib4_notifier_init(struct net *net);
245 void __net_exit fib4_notifier_exit(struct net *net);
246
247 void fib_info_notify_update(struct net *net, struct nl_info *info);
248 int fib_notify(struct net *net, struct notifier_block *nb,
249 struct netlink_ext_ack *extack);
250
251 struct fib_table {
252 struct hlist_node tb_hlist;
253 u32 tb_id;
254 int tb_num_default;
255 struct rcu_head rcu;
256 unsigned long *tb_data;
257 unsigned long __data[];
258 };
259
260 struct fib_dump_filter {
261 u32 table_id;
262 /* filter_set is an optimization that an entry is set */
263 bool filter_set;
264 bool dump_routes;
265 bool dump_exceptions;
266 unsigned char protocol;
267 unsigned char rt_type;
268 unsigned int flags;
269 struct net_device *dev;
270 };
271
272 int fib_table_lookup(struct fib_table *tb, const struct flowi4 *flp,
273 struct fib_result *res, int fib_flags);
274 int fib_table_insert(struct net *, struct fib_table *, struct fib_config *,
275 struct netlink_ext_ack *extack);
276 int fib_table_delete(struct net *, struct fib_table *, struct fib_config *,
277 struct netlink_ext_ack *extack);
278 int fib_table_dump(struct fib_table *table, struct sk_buff *skb,
279 struct netlink_callback *cb, struct fib_dump_filter *filter);
280 int fib_table_flush(struct net *net, struct fib_table *table, bool flush_all);
281 struct fib_table *fib_trie_unmerge(struct fib_table *main_tb);
282 void fib_table_flush_external(struct fib_table *table);
283 void fib_free_table(struct fib_table *tb);
284
285 #ifndef CONFIG_IP_MULTIPLE_TABLES
286
287 #define TABLE_LOCAL_INDEX (RT_TABLE_LOCAL & (FIB_TABLE_HASHSZ - 1))
288 #define TABLE_MAIN_INDEX (RT_TABLE_MAIN & (FIB_TABLE_HASHSZ - 1))
289
fib_get_table(struct net * net,u32 id)290 static inline struct fib_table *fib_get_table(struct net *net, u32 id)
291 {
292 struct hlist_node *tb_hlist;
293 struct hlist_head *ptr;
294
295 ptr = id == RT_TABLE_LOCAL ?
296 &net->ipv4.fib_table_hash[TABLE_LOCAL_INDEX] :
297 &net->ipv4.fib_table_hash[TABLE_MAIN_INDEX];
298
299 tb_hlist = rcu_dereference_rtnl(hlist_first_rcu(ptr));
300
301 return hlist_entry(tb_hlist, struct fib_table, tb_hlist);
302 }
303
fib_new_table(struct net * net,u32 id)304 static inline struct fib_table *fib_new_table(struct net *net, u32 id)
305 {
306 return fib_get_table(net, id);
307 }
308
fib_lookup(struct net * net,const struct flowi4 * flp,struct fib_result * res,unsigned int flags)309 static inline int fib_lookup(struct net *net, const struct flowi4 *flp,
310 struct fib_result *res, unsigned int flags)
311 {
312 struct fib_table *tb;
313 int err = -ENETUNREACH;
314
315 rcu_read_lock();
316
317 tb = fib_get_table(net, RT_TABLE_MAIN);
318 if (tb)
319 err = fib_table_lookup(tb, flp, res, flags | FIB_LOOKUP_NOREF);
320
321 if (err == -EAGAIN)
322 err = -ENETUNREACH;
323
324 rcu_read_unlock();
325
326 return err;
327 }
328
fib4_has_custom_rules(const struct net * net)329 static inline bool fib4_has_custom_rules(const struct net *net)
330 {
331 return false;
332 }
333
fib4_rule_default(const struct fib_rule * rule)334 static inline bool fib4_rule_default(const struct fib_rule *rule)
335 {
336 return true;
337 }
338
fib4_rules_dump(struct net * net,struct notifier_block * nb,struct netlink_ext_ack * extack)339 static inline int fib4_rules_dump(struct net *net, struct notifier_block *nb,
340 struct netlink_ext_ack *extack)
341 {
342 return 0;
343 }
344
fib4_rules_seq_read(struct net * net)345 static inline unsigned int fib4_rules_seq_read(struct net *net)
346 {
347 return 0;
348 }
349
fib4_rules_early_flow_dissect(struct net * net,struct sk_buff * skb,struct flowi4 * fl4,struct flow_keys * flkeys)350 static inline bool fib4_rules_early_flow_dissect(struct net *net,
351 struct sk_buff *skb,
352 struct flowi4 *fl4,
353 struct flow_keys *flkeys)
354 {
355 return false;
356 }
357 #else /* CONFIG_IP_MULTIPLE_TABLES */
358 int __net_init fib4_rules_init(struct net *net);
359 void __net_exit fib4_rules_exit(struct net *net);
360
361 struct fib_table *fib_new_table(struct net *net, u32 id);
362 struct fib_table *fib_get_table(struct net *net, u32 id);
363
364 int __fib_lookup(struct net *net, struct flowi4 *flp,
365 struct fib_result *res, unsigned int flags);
366
fib_lookup(struct net * net,struct flowi4 * flp,struct fib_result * res,unsigned int flags)367 static inline int fib_lookup(struct net *net, struct flowi4 *flp,
368 struct fib_result *res, unsigned int flags)
369 {
370 struct fib_table *tb;
371 int err = -ENETUNREACH;
372
373 flags |= FIB_LOOKUP_NOREF;
374 if (net->ipv4.fib_has_custom_rules)
375 return __fib_lookup(net, flp, res, flags);
376
377 rcu_read_lock();
378
379 res->tclassid = 0;
380
381 tb = rcu_dereference_rtnl(net->ipv4.fib_main);
382 if (tb)
383 err = fib_table_lookup(tb, flp, res, flags);
384
385 if (!err)
386 goto out;
387
388 tb = rcu_dereference_rtnl(net->ipv4.fib_default);
389 if (tb)
390 err = fib_table_lookup(tb, flp, res, flags);
391
392 out:
393 if (err == -EAGAIN)
394 err = -ENETUNREACH;
395
396 rcu_read_unlock();
397
398 return err;
399 }
400
fib4_has_custom_rules(const struct net * net)401 static inline bool fib4_has_custom_rules(const struct net *net)
402 {
403 return net->ipv4.fib_has_custom_rules;
404 }
405
406 bool fib4_rule_default(const struct fib_rule *rule);
407 int fib4_rules_dump(struct net *net, struct notifier_block *nb,
408 struct netlink_ext_ack *extack);
409 unsigned int fib4_rules_seq_read(struct net *net);
410
fib4_rules_early_flow_dissect(struct net * net,struct sk_buff * skb,struct flowi4 * fl4,struct flow_keys * flkeys)411 static inline bool fib4_rules_early_flow_dissect(struct net *net,
412 struct sk_buff *skb,
413 struct flowi4 *fl4,
414 struct flow_keys *flkeys)
415 {
416 unsigned int flag = FLOW_DISSECTOR_F_STOP_AT_ENCAP;
417
418 if (!net->ipv4.fib_rules_require_fldissect)
419 return false;
420
421 memset(flkeys, 0, sizeof(*flkeys));
422 __skb_flow_dissect(net, skb, &flow_keys_dissector,
423 flkeys, NULL, 0, 0, 0, flag);
424
425 fl4->fl4_sport = flkeys->ports.src;
426 fl4->fl4_dport = flkeys->ports.dst;
427 fl4->flowi4_proto = flkeys->basic.ip_proto;
428
429 return true;
430 }
431
432 #endif /* CONFIG_IP_MULTIPLE_TABLES */
433
434 /* Exported by fib_frontend.c */
435 extern const struct nla_policy rtm_ipv4_policy[];
436 void ip_fib_init(void);
437 int fib_gw_from_via(struct fib_config *cfg, struct nlattr *nla,
438 struct netlink_ext_ack *extack);
439 __be32 fib_compute_spec_dst(struct sk_buff *skb);
440 bool fib_info_nh_uses_dev(struct fib_info *fi, const struct net_device *dev);
441 int fib_validate_source(struct sk_buff *skb, __be32 src, __be32 dst,
442 u8 tos, int oif, struct net_device *dev,
443 struct in_device *idev, u32 *itag);
444 #ifdef CONFIG_IP_ROUTE_CLASSID
fib_num_tclassid_users(struct net * net)445 static inline int fib_num_tclassid_users(struct net *net)
446 {
447 return atomic_read(&net->ipv4.fib_num_tclassid_users);
448 }
449 #else
fib_num_tclassid_users(struct net * net)450 static inline int fib_num_tclassid_users(struct net *net)
451 {
452 return 0;
453 }
454 #endif
455 int fib_unmerge(struct net *net);
456
nhc_l3mdev_matches_dev(const struct fib_nh_common * nhc,const struct net_device * dev)457 static inline bool nhc_l3mdev_matches_dev(const struct fib_nh_common *nhc,
458 const struct net_device *dev)
459 {
460 if (nhc->nhc_dev == dev ||
461 l3mdev_master_ifindex_rcu(nhc->nhc_dev) == dev->ifindex)
462 return true;
463
464 return false;
465 }
466
467 /* Exported by fib_semantics.c */
468 int ip_fib_check_default(__be32 gw, struct net_device *dev);
469 int fib_sync_down_dev(struct net_device *dev, unsigned long event, bool force);
470 int fib_sync_down_addr(struct net_device *dev, __be32 local);
471 int fib_sync_up(struct net_device *dev, unsigned char nh_flags);
472 void fib_sync_mtu(struct net_device *dev, u32 orig_mtu);
473 void fib_nhc_update_mtu(struct fib_nh_common *nhc, u32 new, u32 orig);
474
475 /* Fields used for sysctl_fib_multipath_hash_fields.
476 * Common to IPv4 and IPv6.
477 *
478 * Add new fields at the end. This is user API.
479 */
480 #define FIB_MULTIPATH_HASH_FIELD_SRC_IP BIT(0)
481 #define FIB_MULTIPATH_HASH_FIELD_DST_IP BIT(1)
482 #define FIB_MULTIPATH_HASH_FIELD_IP_PROTO BIT(2)
483 #define FIB_MULTIPATH_HASH_FIELD_FLOWLABEL BIT(3)
484 #define FIB_MULTIPATH_HASH_FIELD_SRC_PORT BIT(4)
485 #define FIB_MULTIPATH_HASH_FIELD_DST_PORT BIT(5)
486 #define FIB_MULTIPATH_HASH_FIELD_INNER_SRC_IP BIT(6)
487 #define FIB_MULTIPATH_HASH_FIELD_INNER_DST_IP BIT(7)
488 #define FIB_MULTIPATH_HASH_FIELD_INNER_IP_PROTO BIT(8)
489 #define FIB_MULTIPATH_HASH_FIELD_INNER_FLOWLABEL BIT(9)
490 #define FIB_MULTIPATH_HASH_FIELD_INNER_SRC_PORT BIT(10)
491 #define FIB_MULTIPATH_HASH_FIELD_INNER_DST_PORT BIT(11)
492
493 #define FIB_MULTIPATH_HASH_FIELD_OUTER_MASK \
494 (FIB_MULTIPATH_HASH_FIELD_SRC_IP | \
495 FIB_MULTIPATH_HASH_FIELD_DST_IP | \
496 FIB_MULTIPATH_HASH_FIELD_IP_PROTO | \
497 FIB_MULTIPATH_HASH_FIELD_FLOWLABEL | \
498 FIB_MULTIPATH_HASH_FIELD_SRC_PORT | \
499 FIB_MULTIPATH_HASH_FIELD_DST_PORT)
500
501 #define FIB_MULTIPATH_HASH_FIELD_INNER_MASK \
502 (FIB_MULTIPATH_HASH_FIELD_INNER_SRC_IP | \
503 FIB_MULTIPATH_HASH_FIELD_INNER_DST_IP | \
504 FIB_MULTIPATH_HASH_FIELD_INNER_IP_PROTO | \
505 FIB_MULTIPATH_HASH_FIELD_INNER_FLOWLABEL | \
506 FIB_MULTIPATH_HASH_FIELD_INNER_SRC_PORT | \
507 FIB_MULTIPATH_HASH_FIELD_INNER_DST_PORT)
508
509 #define FIB_MULTIPATH_HASH_FIELD_ALL_MASK \
510 (FIB_MULTIPATH_HASH_FIELD_OUTER_MASK | \
511 FIB_MULTIPATH_HASH_FIELD_INNER_MASK)
512
513 #define FIB_MULTIPATH_HASH_FIELD_DEFAULT_MASK \
514 (FIB_MULTIPATH_HASH_FIELD_SRC_IP | \
515 FIB_MULTIPATH_HASH_FIELD_DST_IP | \
516 FIB_MULTIPATH_HASH_FIELD_IP_PROTO)
517
518 #ifdef CONFIG_IP_ROUTE_MULTIPATH
519 int fib_multipath_hash(const struct net *net, const struct flowi4 *fl4,
520 const struct sk_buff *skb, struct flow_keys *flkeys);
521 #endif
522 int fib_check_nh(struct net *net, struct fib_nh *nh, u32 table, u8 scope,
523 struct netlink_ext_ack *extack);
524 void fib_select_multipath(struct fib_result *res, int hash);
525 void fib_select_path(struct net *net, struct fib_result *res,
526 struct flowi4 *fl4, const struct sk_buff *skb);
527
528 int fib_nh_init(struct net *net, struct fib_nh *fib_nh,
529 struct fib_config *cfg, int nh_weight,
530 struct netlink_ext_ack *extack);
531 void fib_nh_release(struct net *net, struct fib_nh *fib_nh);
532 int fib_nh_common_init(struct net *net, struct fib_nh_common *nhc,
533 struct nlattr *fc_encap, u16 fc_encap_type,
534 void *cfg, gfp_t gfp_flags,
535 struct netlink_ext_ack *extack);
536 void fib_nh_common_release(struct fib_nh_common *nhc);
537
538 /* Exported by fib_trie.c */
539 void fib_alias_hw_flags_set(struct net *net, const struct fib_rt_info *fri);
540 void fib_trie_init(void);
541 struct fib_table *fib_trie_table(u32 id, struct fib_table *alias);
542 bool fib_lookup_good_nhc(const struct fib_nh_common *nhc, int fib_flags,
543 const struct flowi4 *flp);
544
fib_combine_itag(u32 * itag,const struct fib_result * res)545 static inline void fib_combine_itag(u32 *itag, const struct fib_result *res)
546 {
547 #ifdef CONFIG_IP_ROUTE_CLASSID
548 struct fib_nh_common *nhc = res->nhc;
549 #ifdef CONFIG_IP_MULTIPLE_TABLES
550 u32 rtag;
551 #endif
552 if (nhc->nhc_family == AF_INET) {
553 struct fib_nh *nh;
554
555 nh = container_of(nhc, struct fib_nh, nh_common);
556 *itag = nh->nh_tclassid << 16;
557 } else {
558 *itag = 0;
559 }
560
561 #ifdef CONFIG_IP_MULTIPLE_TABLES
562 rtag = res->tclassid;
563 if (*itag == 0)
564 *itag = (rtag<<16);
565 *itag |= (rtag>>16);
566 #endif
567 #endif
568 }
569
570 void fib_flush(struct net *net);
571 void free_fib_info(struct fib_info *fi);
572
fib_info_hold(struct fib_info * fi)573 static inline void fib_info_hold(struct fib_info *fi)
574 {
575 refcount_inc(&fi->fib_clntref);
576 }
577
fib_info_put(struct fib_info * fi)578 static inline void fib_info_put(struct fib_info *fi)
579 {
580 if (refcount_dec_and_test(&fi->fib_clntref))
581 free_fib_info(fi);
582 }
583
584 #ifdef CONFIG_PROC_FS
585 int __net_init fib_proc_init(struct net *net);
586 void __net_exit fib_proc_exit(struct net *net);
587 #else
fib_proc_init(struct net * net)588 static inline int fib_proc_init(struct net *net)
589 {
590 return 0;
591 }
fib_proc_exit(struct net * net)592 static inline void fib_proc_exit(struct net *net)
593 {
594 }
595 #endif
596
597 u32 ip_mtu_from_fib_result(struct fib_result *res, __be32 daddr);
598
599 int ip_valid_fib_dump_req(struct net *net, const struct nlmsghdr *nlh,
600 struct fib_dump_filter *filter,
601 struct netlink_callback *cb);
602
603 int fib_nexthop_info(struct sk_buff *skb, const struct fib_nh_common *nh,
604 u8 rt_family, unsigned char *flags, bool skip_oif);
605 int fib_add_nexthop(struct sk_buff *skb, const struct fib_nh_common *nh,
606 int nh_weight, u8 rt_family, u32 nh_tclassid);
607 #endif /* _NET_FIB_H */
608